set 2

Question 1

Which one need contact? Which one works without air? Which one works in liquid and gas?

Answer 1

Conduction needs contact.
Radiation because it moves in waves doesn’t need air.
Convection works in liquid and gas

Question 2

What happens when you change amplitude and frequency?
(Brightness/colour)

Answer 2

The higher the frequency, the more energy, and the higher the amplitude, the more energy.

Question 3

What is reflection?

Answer 3

an instance of reflecting. especially : the return of light or sound waves from a surface.

Question 4

What surfaces does reflection work on?

Answer 4

If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface.

Question 5

Draw a diagram of Reflection

Answer 5

(incident ray and reflected ray on diagram)

Question 6

What happens to the angle of incident and how is it compared to the angle of reflection?

Answer 6

The angle of incidence is equal to the reflected angle through the law of reflection. The angle of incidence and the angle of reflection is always equal

Question 7

What is refraction?

Answer 7

Refraction happens when light changes direction, or bends, when it moves from one material to another. For example, light traveling through the air refracts when it hits water.

Question 8

Draw a diagram that shows no refraction

Question 9

What happens to light when you change medium?
What happens when you go from a air to glass? (lower to higher density)

Answer 9

the light refracts.
If light enters any substance with a higher refractive index (such as from air into glass) it slows down.

Question 10

draw light wave